39. Think of the middle ear as “a rectangular box” with six sides: Name all six sides using the anatomical location name (for example, superior) and additionally, name at least one landmark on each side.

lateral wall is the tm, opposite is the medial wall ,superior to the promitory is the oval window, infirior to the promitory is the round window, on the anterior wall is the opening for the Eustachian tube, on the posterior wall is the aditus medial to the aditus is the facial nerve canal, on the floor is the jugular fassa, ceiling is the bone

41. How is the eustachian tube similar to OR different from the external auditory canal?

similar cartilage and bone external has cerumin and the other has mucus

42. What are the two functions of the eustachian tube?

Active transport system , source of ventilation

43. What is a consequence if the major function at #42 is compromised?

mucous brakes down tm gets more pressure

44. What are the ossicles (name, location)?

incus, maleus, and stapes

What ossicle attaches to the tympanic membrane?

Malleus

45. To what membrane is the stapes attached?

46. What are the two middle ear muscles?

the tensor tympanic muscle and the stapedius muscle,

Where does each arise from and each attach to?

Arises at Anterior Wall of ME, Attaches to Malleus, Arises at Posterior Wall of ME, Attaches to Stapes

47. What are the three general functions of the outer ear?

collection of sound waves,

48. What specifically contributes to the protection function of the outer ear?

ceruman, shape of the ear canal

49. Why does the outer ear have “a resonant frequency”?

because it has a mechanics and also a cavity

50. In an average adult, what is the typical resonant frequency of the ear canal?

3000hz

51. When is the resonant frequency of the ear canal measured in clinical work in audiology?